Effect of synthetic microfiber and viscosity modifier agent on layer deformation, viscosity, and open time of cement mortar for 3D printing application

Sukontasukkul, Piti; Panklum, Kasidet; Maho, Buchit; Banthia, Nemkumar; Jongvivatsakul, Pitcha; Imjai, Thanongsak; Sata, Vanchai; Limkatanyu, Suchart; Chindaprasirt, Prinya

doi:10.1016/j.conbuildmat.2021.126111

Cited by 15 publications

(11 citation statements)

References 32 publications

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“…The smallest w int of 30.4 mm was obtained in MF100 where the fiber content was the highest (0.10% volume Source: Authors' work fraction). The decrease in w int was a direct result of the microfibers providing immediate support to the fresh mix, which allowed the mortar to maintain its height better than the non-fiber mix (Sukontasukkul et al, 2022).…”

Section: Initial Printable Timementioning

confidence: 99%

“…The initial printable time refers to the time when a cement material can be extruded (or printed) continuously into a filament with uniform and stable dimensions and able to support its weight. On the contrary, the time when the cement cannot be printed continuously or in uniform dimensions is called the final printable time (Ma et al , 2018; Sukontasukkul et al , 2022; Chen et al , 2020).…”

Section: Introductionmentioning

confidence: 99%

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Precise determination of initial printable time for cement mortar 3D printing using a derivative method

Sukontasukkul,

Maho,

Komkham

et al. 2023

RPJ

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Purpose This study aims to propose a technique that establishes a mathematical relationship between width and time, and utilizes a derivative method to determine the initial printable time (tint) for mortar suitable for 3D printing. The study conducted experimental tests on the tint, layer strain, and the relationship between filament width and time. These tests involved plain mortar and mortar reinforced with micro-fibers at varying volume fractions. The tint was determined analytically using the derivative method. Design/methodology/approach This study introduces a technique to accurately determine the initial printable time (tint) and width/height of printed cement mortar. Precise tint determination is essential for ensuring proper filament printing timing and eliminating the need for trial and error. Findings Results show that the proposed technique accurately determines the tint, as evidenced by the resemblance between expected and actual initial widths. Fiber-reinforced mortar (FRM) has a smaller tint than plain mortar, which decreases with an increasing fiber content. Additionally, FRM displays smaller layer strains compared to plain mortar. Research limitations/implications Results show that the proposed technique accurately determines the tint, as evidenced by the resemblance between expected and actual initial widths. FRM exhibits smaller tint and displays smaller layer strains than plain mortar. Originality/value This study introduces a novel technique that uses a mathematical relationship to determine the tint and height of cement mortar printing.

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Section: Initial Printable Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Precise determination of initial printable time for cement mortar 3D printing using a derivative method

Sukontasukkul,

Maho,

Komkham

et al. 2023

RPJ

Self Cite

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“…Cementitious materials are widely accepted for passive fire protection because of their cost effectiveness, low thermal conductivity, and non-combustibility. Cementitious materials are also compatible and work well with different kinds of property enhancement additives or materials on both micro- and macro-structure levels, for example, carbon nanotube [ 6 , 12 ], graphene oxide [ 13 , 14 , 15 ], polymeric materials [ 16 , 17 , 18 , 19 ], phase change materials [ 20 , 21 , 22 , 23 ], fibers [ 24 , 25 , 26 , 27 , 28 , 29 ], mineral materials [ 30 , 31 , 32 ], crumb rubber [ 33 , 34 , 35 ], etc. Especially in the case of polymeric material such as superabsorbent polymer (SP), during the past decade there has been a growing interest in the application of SPs in cement-based materials [ 36 , 37 , 38 ].…”

Section: Introductionmentioning

confidence: 99%

Use of Cement Mortar Incorporating Superabsorbent Polymer as a Passive Fire-Protective Layer

et al. 2022

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Concrete structures, when exposed to fire or high temperatures for a certain time, could suffer partial damage or complete structural failure. Passive fire-protective coating materials are an alternative way to prevent or delay damage to concrete structures resulting from fire. Superabsorbent polymer (SP) is a synthetic material known for its ability to absorb and retain a large volume of water within itself. With this unique property, the SP exhibits great potential for use as a passive fire protection material. Although several studies have been carried out to investigate the effect of SP as a surface coating material for fire protection, very few have been investigated on the potential use of SP mixed with mortar as a passive fire-protective layer. The objective of this study is to introduce the use of SP in plastering mortar as a fire-protective layer for concrete subjected to temperatures up to 800 °C. This study is divided into two parts: (1) investigating the properties of cement mortar mixed with SP at 0.5% (CONC/SP-0.5) and 1.0% (CONC/SP-1.0) by weight of cement, and (2) investigating the potential use of SP mortar as a plastering layer for concrete subject to high temperatures. The experimental results showed that the density and compressive strength of SP mortar decreases with increasing SP dosages. From the heat exposure results, SP mortar exhibited lower strength loss due to the ability to mitigate moisture through its interconnected pore system. As for the use of SP mortar as a plastering layer, the results demonstrated the concrete specimen plastered with SP mortar had a lower temperature at the interface and core than that plastered with plain mortar. This led to a reduced strength loss of 20.5% for CONC/SP-0.5 and 17.2% for CONC/SP-1.0.

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“…Mechanical deformation is a common physical phenomenon in life, and has been widely used in industrial production, such as 3D printing, stamping of parts, robot skin, airbags, etc. [10][11][12][13]. The model parameters can be measured according to the experimental method, or the numerical simulation can be established according to the existing theoretical model.…”

Section: Related Workmentioning

confidence: 99%

“…The geometric appearance is mainly a rectangular plate, with four small circular holes and a central elliptical hole inside. The length of the rectangular plate is L = 12 m, and the width is H = 12 m. The center coordinates of the four small circles are (10,8) in turn. The radius of the four small circles is r = 0.8 m. The center elliptical hole long axis a = 2 m, and the short axis b = 1 m. The two-dimensional linear elastic mechanics equation solved by this example is:…”

Section: Numerical Example Of 2d Thin-plate Deformation Solved By Hyb...mentioning

confidence: 99%

Thermal-Mechanical Coupling Model Based on the Hybrid Finite Element Method for Solving Bipolar the Plate Deformation of Hydrogen Fuel Cells

2022

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New energy is the focus of attention all over the world, and research into new energy can inject new vitality into the industrial system. Hydrogen fuel cells are not only environmentally friendly, but also rich in reserves that can be used as a strategic resource for the entire country. The difficulty lies in the safe design of application equipment and the batch generation and storage of hydrogen. In addition, fuel cells have the disadvantage of a slow start-up. Based on the above problems, this paper proposes a hybrid-element method to solve the thermal-mechanical coupling model of fuel cell plate, which can effectively solve the thermal stress change, temperature field distribution and displacement change of the battery plate when working. Firstly, the hybrid-element algorithm is given for 2D plate deformation. Then, the deformation application of a 3D fuel cell plate is given. The 2D numerical results show that the hybrid finite element method (FEM) is more flexible for realizing the flexible combination of sub-mesh and finite element basis functions, and has a better mesh quality compared to the traditional constant strain triangular element (CST) adaptive FEM and quadrilateral isoparametric element (Q4) adaptive FEM. This method achieves a balance between numerical accuracy and solving efficiency for the multi-porous elastic plate. In addition, a deformation control formula is given which can display the displacement deformation and stress merge to same graph, since it is convenient to quickly compare the regions where the displacement and stress extremum appear. In short, the hybrid finite element method proposed in this paper has good mesh evaluation results, and when the number of discrete elements is equivalent, the hybrid element converges faster and the solution efficiency is higher. This paper also provides a good numerical theory and simulation reference for industrial mechanics and new energy applications.

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Effect of synthetic microfiber and viscosity modifier agent on layer deformation, viscosity, and open time of cement mortar for 3D printing application

Cited by 15 publications

References 32 publications

Precise determination of initial printable time for cement mortar 3D printing using a derivative method

Precise determination of initial printable time for cement mortar 3D printing using a derivative method

Use of Cement Mortar Incorporating Superabsorbent Polymer as a Passive Fire-Protective Layer

Thermal-Mechanical Coupling Model Based on the Hybrid Finite Element Method for Solving Bipolar the Plate Deformation of Hydrogen Fuel Cells

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